Guidelines for Active Crossover Networks in Monolitic Power Amplifier Chips like LM1875, TDA7294, LM3886 or LM3875

In the attachment from page 8/15 to 10/15 there are to find a description of an active crossover network.
The following special feature is noticeable:
No additional line-level gain stages for the filter stages as commonly usual, i. e. the op-amp for the low-, high- and band pass is the power amp itself.
Except the example from attachment I don't find more information on the web.
Nevertheless there are probably several additional papers concerning this (NXP, Texas Instruments, OnSemi and so on).

Thank you for sending appropriate URL's therefore.
 

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